Enel Green Power, the renewable energy unit of Italian utility Enel, and UK-based gravity storage specialist Energy Vault have announced plans to build a large-scale gravity storage facility in the United States. The system will operate in the ERCOT market and will also serve the Solutions Excellence Center in Texas, a research facility currently under construction. The plant is one of the first of its kind in the world and the first in the West. The Energy Vault system, which demonstrated round-trip efficiency of about 75% in a pilot project installed in Switzerland in 2020, is expected to be improved to about 80%, placing it in a similar range as pumped hydro storage and grid-scale batteries.

Solar Dominates US Energy Capacity Growth
The Federal Energy Regulatory Commission (FERC) has published data showing that solar accounted for over 75% of US electrical generating







